/Engine/Source/Runtime/Slate/Public/Framework/MultiBox/MultiBox.h
typedef TBaseDelegate_ThreeParams< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) >, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SMultiBoxWidget](API\Runtime\Slate\Framework\MultiBox\SMultiBoxWidget) > &, const [FMultiBlock](API\Runtime\Slate\Framework\MultiBox\FMultiBlock) &, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & > FOnModifyBlockWidgetAfterMake